[IPV6]: Consolidate common SNMP code
This patch moves the non-proc SNMP code into addrconf.c and reuses
IPv4 SNMP code where applicable.
As a result we can skip proc.o if /proc is disabled.
Note that I've made a number of functions static since they're only
used by addrconf.c for now. If they ever get used elsewhere we can
always remove the static.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 33ccc95..ea86bf4 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -81,6 +81,7 @@
#endif
#include <asm/uaccess.h>
+#include <asm/unaligned.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
@@ -246,6 +247,37 @@
add_timer(&ifp->timer);
}
+static int snmp6_alloc_dev(struct inet6_dev *idev)
+{
+ int err = -ENOMEM;
+
+ if (!idev || !idev->dev)
+ return -EINVAL;
+
+ if (snmp_mib_init((void **)idev->stats.ipv6,
+ sizeof(struct ipstats_mib),
+ __alignof__(struct ipstats_mib)) < 0)
+ goto err_ip;
+ if (snmp_mib_init((void **)idev->stats.icmpv6,
+ sizeof(struct icmpv6_mib),
+ __alignof__(struct icmpv6_mib)) < 0)
+ goto err_icmp;
+
+ return 0;
+
+err_icmp:
+ snmp_mib_free((void **)idev->stats.ipv6);
+err_ip:
+ return err;
+}
+
+static int snmp6_free_dev(struct inet6_dev *idev)
+{
+ snmp_mib_free((void **)idev->stats.icmpv6);
+ snmp_mib_free((void **)idev->stats.ipv6);
+ return 0;
+}
+
/* Nobody refers to this device, we may destroy it. */
static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
@@ -3438,6 +3470,34 @@
);
}
+static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
+ int bytes)
+{
+ int i;
+ int pad = bytes - sizeof(u64) * items;
+ BUG_ON(pad < 0);
+
+ /* Use put_unaligned() because stats may not be aligned for u64. */
+ put_unaligned(items, &stats[0]);
+ for (i = 1; i < items; i++)
+ put_unaligned(snmp_fold_field(mib, i), &stats[i]);
+
+ memset(&stats[items], 0, pad);
+}
+
+static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
+ int bytes)
+{
+ switch(attrtype) {
+ case IFLA_INET6_STATS:
+ __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
+ break;
+ case IFLA_INET6_ICMP6STATS:
+ __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
+ break;
+ }
+}
+
static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
u32 pid, u32 seq, int event, unsigned int flags)
{